Earlier quoted context omitted.
> I've found that users really are idiots > when it comes to typing that in. They're not idiots. It is normal for people not to work at the level of precision that this sort of thing requires. Decades of work on these sorts of things have shown me that it is computer programmers who are not normal. The ability to get thousands, even millions of characters exactly right is extremely unusual, even with extended trainin…
At what rate do people screw up addresses on regular mailing envelopes?
If I get the post code wrong but the rest of the address right, the letter will get through. If I make a typo in the name or address, the letter will get through.
If I make even the tiniest of typos in the email address, it'll fail.